∫-ππ(sin3x+)dx=_______.

admin2017-02-21  39

问题π(sin3x+)dx=_______.

选项

答案π3/2

解析π(sin3x+)dx=2∫0π(2∫0π/2πcost.πcostdt=2π20π/2πcos2tdt=2π22.3/2.
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